Thanks a lot for these suggestions. We will think over it.
BTW. The single finger swipe horizontally and vertically seems too easy to do we'd accidentally swipe it changing the audio channel or subtitle unintentionally.
Why not use 2 or even 3 finger swipe (just like how iTAP VNC) to do some of these functions..
Secondly, when changing subtitles or audio channels, I'd like to see a visual confirmation that it was indeed changed like perhaps, displaying on the screen it is now showing "Subtitle#3 Selected" or "Audio Channel #4 Selected". Its easier this way than waiting for a scene with dialogues to confirm we are on the right settings.
Lastly, a help menu, or tutorial on these swipe commands built into the app (like iTAP VNC). these may be icings on the cake, but it does add up nicely to the overall user experience.